CNC Machining: What are the Advantages of Using Electrophoretic Coating for CNC Machining of Aluminum Profiles?

After more than 20 years of development, my country's aluminum profile industry has formed a complete industrial system and has become one of the pillar industries of the national economy. The output of primary aluminum has reached more than 2.5 million tons, ranking third in the world. The annual aluminum numerical control processing capacity is more than 10 million tons/year, and the annual output of aluminum profiles reaches 1 million tons/year. At present, it has entered a period of high-grade development. The surface treatment of aluminum profile CNC machining parts has also been rapidly developed, from a single copper material to a new generation of wood grain treatment technology, using powder coatings, fluorocarbon coatings, organic and inorganic dyeing, and electrophoretic coatings. , Mechanical and chemical polishing, three-step electrolytic multicolor coloring and micro-arc oxidation coloring technology are also in trial production. The aluminum profile CNC machined parts have the appearance of titanium, gold, champagne, imitation stainless steel and other colors, as well as display mirrors and sand. , Light, pearl and other special effects.

Among many surface treatment technologies, electrophoretic coating is the most suitable technology for development. The aluminum profile CNC machined parts are subjected to anodizing and electrolytic coloring before electrophoresis, which has a double protective effect. With its high light transmittance, high metallic texture, high corrosion resistance and high weather resistance, it is more decorative than painting and powder spraying, and is loved by users. It has been widely used in the field of home decoration and has a huge market potential. Second, the process is easy to implement. As long as the original production line adds a small amount of grooves and alumina coloring to form an assembly line production, the water-soluble electrophoretic coating is safe, and a closed loop can be realized, which is beneficial to environmental protection. Third, and more importantly, the electrophoresis pattern is more attractive and a model of high-end luxury goods.

The electrophoretic coating method has the following advantages:

(1) It is easy to realize automatic production: Since electrophoretic coating is similar to anodizing and electrolytic coloring processes in a water electrophoresis tank, the numerical control processing time is short, and the whole process of the assembly line is easy to realize.

(2) Uniform and compact coating film: Due to the high swimming permeability of electrophoretic coating, a uniform coating film can be obtained even with complex cross-sectional shapes, and the thickness of the film can be controlled by adjusting the charge.

(3) High paint utilization rate: Due to the low viscosity, few CNC machined parts are produced, electrophoretic CNC machined parts can be cleaned, and the utilization rate of electrophoretic coating paint can reach more than 95% by using the recycling device.
 

(4) Safety and environmental protection: Electrophoretic coatings are environmentally friendly coatings with water dilution, low solid content and low content, which are protected from fire hazards and also protect the health of workers.

(5) Good coating quality: The acrylic resin is cured with amino resin to ensure the high decoration and high corrosion resistance of the coating film. At the same time, due to the high light transmittance of the resin, it effectively highlights the texture of the metal and can also According to the needs, the decorative effects of ferrous iron, sand, pearl, etc. can be obtained.

(6) Compared with the traditional electrolytic coloring and sealing process, this process has the characteristics of time-saving and labor-saving, and the electrophoretic coating film does not need to be sealed, which avoids the cracks caused by poorly sealed holes.

(7) Freely control the thickness of the coating, ranging from 5 to 30 m.

(8) Due to the light transmission of the electrophoretic layer, the aluminum ingot is required to have high quality, smooth surface of the extruded material, fewer mechanical defects, and strict management of the oxidation and coloring process, because any slight defects and stains will be exposed under the transparent coating.

(9) Put forward higher requirements for electrophoresis process management to increase the yield of CNC machining parts.